Wouldn't bet on it, but maybe. They might want that to be reserved for Dragon Ball Magic (if legit), or whatever it's called. Speaking of which, I'm excited at the prospect of Super and MAGIC characters being playable in BT4.
The one thing I really love about modern Dragon Ball games is that they actually have a plethora of new material to draw from. Not only will we be getting characters like the Gammas and Cell Max, but if rumors are true, BT4 will most likely include Kid Goku (Magic) and Kid Supreme Kai (Magic), along with the demon that turned them into kids, and other new Magic characters (maybe even story mode content based around it). Again, if the rumors are true.
This scenario is extremely likely since Dragon Ball Magic will be animated with voices, unlike the Moro Arc and Granola Arc being off limits for use in, well, anything. One thing I'm also curious about is does this mean no more Kid Goku (GT) in the games or will they include him along with Kid Goku (Magic) like the two Brolys in the games? I guess you'd still have to differentiate them due to one having access to Ultra Instinct.
And I really hope that the Moro Arc onwards material is adapted into anime so we can have it in the games. Moro, Merus, Seven-three, Granola, Gas, Ultra Ego Vegeta, and Black Frieza would be welcome in the game, even as DLC characters.